DOOR LOCK WITH AN EMERGENCY HANDLE FOR MAXIMUM SECURITY

Abstract: Safety lock (10) for doors with a normal lock (14) and emergency handle (15), said handle simultaneously determining, in its translation against the door, release of the internal bolt (12), its sliding movement and opening of the door.

Description: DOOR LOCK WITH AN EMERGENCY HANDLE FOR MAXIMUM SECURITY The invention concerns safety locks especially those provided with an emergency handle for preventing panic. Presently known anti-panic locks comprise a horizontal r handle that projects from the inside face of the door. Translating under pressure from the front, said handle opens the lock even if it has been closed with a key. If there is pressure from a crowd of panic-striken peo¬ ple it is sometimes difficult, or even impossible, to open the door even when released by the emergency handle. Emergency situations can in fact complicate even the simplest operations. The above invention offers a decisive contribution to opening a door in an emergency as will be explained be- low. Subject of the invention is a safety lock for doors with a horizontal bar-shaped translating emergency han¬ dle, a bolt plate on which is mounted an ordinary handle of the lever type, supported by a heavy base plate and an ordinary lock. On translating against the door the emergency handle de ¬ termines movement of said bolt plate against the base plate. Said translation determines a break in mechanical con¬ nection between said bolt plate and the bolt in the or¬ dinary lock. Following movement by the emergency handle, this break in connection permits longitudinal translation of said bolt plate consequently releasing the door even if locked in the usual wa . By maintaining pressure on the emergency handle the door opens . Mechanical connection between the bolt plate and the bolt in the ordinary lock is made by an intermediate device. This device comprises a pin, fixed to the base plate, on which a small cylinder governed by a spring can freely rotate, said cylinder exhibiting an orthogonal extension subject to action by a tie rod fixed to the bolt of the ordinary lock . A locking tooth is mounted on the bolt plate and when the bolt plate translates said tooth moves as well and becomes aligned with the plane of the above extension provoking interference with the axis of the cylinder pin. In said extension there is a radial slit wider than the size of the locking tooth. When the ordinary lock is closed the door is therefore locked by the bolt plate which cannot translate because its locking tooth is held firm against the extension. When the ordinary lock is open its bolt determines, by means of said rod, rotation of the extension until the radial slit is aligned with the trajectory followed by the locking tooth. By means of the ordinary lever-type handle, free trans¬ lation of the bolt plate is possible and consequently the door is released and can be opened. The effect of rotating the arms, at the extremities of the emergency handle and by which it is articulated onto the base plate, is to make the emergency handle ro¬ tate a vertical shaft substantially parallel to the bolt plate. On said shaft is an arm with a hook at its end, said hook penetrating inside a longitudinal slot in the bolt plate. An intermediate vertical rod is fixed to said arm. Pressure by this rod on the bolt plate makes it move to- wards the base plate overcoming resistance opposed by springs, causing the locking tooth to move away from the extensio . The hook on the end of the arm meanwhile presses against the end of the slot causing the bolt plate to translate and so release the means that fix the door to its frame. The door can therefore be opened by simply exerting pres¬ sure on the emergency handle. The vertical shaft carries a short arm whose position corresponds to that of a pane of glass, replaceable, mounted on the base plate. Rotation of said shaft caused by movement of the emergency handle will lead to this pane of glass becoming broken. The pane itself is associated to an electric sensor that warns a control centre if the glass has been broken. The bolt plate exhibits a short pin that presses on a sensor so informing a control centre of the movement made by said plate. All moving parts are made of stainless steel for maximum life and highest efficiency of the invented lock. The invention offers evident advantages. By simply applying pressure to the emergency handle, by the hand, any other part of the body oe even by an invalid's wheel chair, the door is rapidly unlocked and opens from the inside. From the outside the door can be opened and closed with keys in the ordinary way. The invented lock can comprise within it an ordinary lock of any kind . The mechanism described enables connection to be made between an ordinary lock and the special devices that ensure easy opening in an emergency as explained. The invented lock can be included in any alarm system; it will guarantee maximum protection and certainty of immediate and easy opening from the inside if an emer¬ gency arises. Presence of the pane of glass, which breaks when the emergency opening is made, and of the sensors both on the pane and in the bolt plate, make it possible to ex¬ ert full control even in an emergency situation. The use of stainless steel for all moving parts of the lock guarantees a high level of long-term, effieiency . Characteristics and purposes of the invention will ap¬ pear even more clearly from the following example of its execution illustrated by diagrammatic drawings. Fig.1 The safety lock with lever-type handle and emer¬ gency handle, shown locked and with the emergency handle idle, an internal perspective view. Fig.2 The same as Fig.1, unlocked. Fig.3 The unlocked position in Fig.2 with the door re ¬ leased by the lever handle. Fig.4 The lock in the locked position with the door re- leased by means of the emergency handle. The safety lock 10 with emergency handle 15 is mounted on the door 60 (Fig. 5). The keyhole 24 of an ordinary lock 14 and usual type of turning handle 13 are shown in the drawing. By applying pressure to the emergency handle 15, seen in Fig.6, the lock is released and, simultaneously, the door opens as will be explained below. The lock comprises a base plate 11 mounted on the inside of the door 60 so that the arms 72 of the translating handle 15 pass through the slits 68 in the door. Said arms 72 are articulated on the supports 32 of the base plate 11. The articulating means comprises trunnions 33 held in place by split pins 34. The door 60 is locked by a bolt plate 12 which functions by means of pins 55, at its ends, on the corner pieces 56 fixed to a bolt with heads that penetrate in the ca¬ vity of the door frame to hold it firm. For the sake of simplicity this bolt is not illustrated. The pins 55 act on the corner pieces through slots 57. The bolt plate 12 can translate longitudinally guided by the slots 61 through which pass pins 17 with threaded ends 19 fixed to the base plate 11, said bolt plate be¬ ing served by the stop block 97. The coaxial springs 18 hold, the plate 12 against the wa ¬ shers 20, in turn held in position by the nut 21. Translation of the bolt plate 12 can be determined by the handle 13 that freely turns on the pin 69 fixed to the base plate I I, said handle having an internal arm 66 on which is mounted a fork 67 inside which penetrates the small pin 95 fixed to the bolt plate 12. To close the door the lock 14 with keyhole 24 and bolt 39 is mounted on the bracket^ 35 fixed onto the base plate 11. Between the bolt plate 12 and lock 14 a pin 44 is fixed onto the base plate 11 on which pin the cylinder, wound with its coaxial spring 46, can freely turn together with its extension 41. One end of said spring is hooked into the bracket 35 carrying the lock 14 and the other end is joined to the short pin 43 fixed to said extension 41. A washer 42 and nut 43 are fitted onto the pin 44. In said extension is a radial slit 58 and a hole 47 through which penetrates arm 49 and rod 48 mounted on the bolt 39 of the lock 1 . To the bolt plate 12 the locking tooth 70 is fixed, con¬ trap-osed to the end of the extension 41. The bolt 39 of, lock 14 assumes two positions according to whether the lock is closed (Figures 1,4) or open Figures 2,3), namely positions 39 or 39' . Action by the rod 48 causes the slit 58 in extension 41 to take up its respective positions 58 or 58'. Clearly, when the lock 14 is closed the bolt plate 12 is blocked by contraposition of extension 41 to locking tooth 70 and therefore the door 60 too remains closed. When the lock 14 is open the slit 58 is contraposed to the locking tooth 70 and so, by turning the lever-type handle 13, the bolt plate 12 can translate into the posi- tion for opening the door (Fig.3). Pins 77 are fixed on the bolt plate 12 and on these pins the pair of couplings 75 freely slide connected by bar 78. Fixed to said couplings are pins 74 aligned parallel to the bolt plate 12; these penetrate through slots 73 made in the arms 72 of the translating handle 15. In bar 78 is a slot 82 through which penetrates pin 83 of arm 84 fixed to the shaft 16 that freely turns on supports 30 ith their heads 31. Said shaft has a second arm 86 forming a hook 88 which carries a rod 87 parallel to the shaft 16, itself paral¬ lel to the plate 12. The hook 88 fits inside the slot 62 in the plate 12 (Fig. l). If an emergency arises pressure on the translating handle 15, as in Figures 6 and 4, determines translation of said handle towards the door 60 with rotation of arms 72 which, by means of slots 73 and pins 74, pull the bar 78 towards the bolt plate 12. As a consequence of this shaft 16 is compelled to rotate due to pressure of slot 82 on pin 83 of the arm 84. This, rotation of the shaft determines rotation of the arm 86 and of ,the rod 87 towards the bolt plate 12, this * latter consequently moving against the base plate 11 and compressing the spring 18. At the same time the hook 88, pressing against the end 63 of the slot 62, causes the bolt plate 12 to translate against the extension 41 as well, said extension offer- ing no opposition to movement of the locking tooth 70 which then lies on a geometrical plane further back. The bolt plate 12 therefore assumes the position seen in Figure 4 corresponding to release of the door since the bolt fixed to the corner pieces 56 is obviously drawn along by the bolt plate 12 itself. Released by pressure from the translating handle 15, the door opens to create an emergency exit. At the upper end of the shaft 16 the arched arm 90 is forced by rotation of said shaft 16 to press against the pane of glass 27, surrounded by its frame fixed by spa ¬ cers 25 to the base plate 11, thus breaking the glass (Figure 4). This breakage is signalled by the sensor 91 to a control centre. Translation of the bolt plate 12 is also sig¬ nalled to the control centre by the sensor 54 whose lever 75 is pressed by the pin 50 and head 53 on which the co- axial reaction spring 52 and split pin 51 are inserted. The above invention has been described as one example of its use; it must therefore be understood that appli¬ cation to patent comprises every equivalent product exe¬ cuted and/or functioning in accordance with any one or more of the characteristics set forth in the following c1aims .

Claims: C L A I M S 1. Safety lock ( 10) for doors (60) with an emergency handle ( 15) in the form of a horizontal translating bar, a bolt plate ( 12) supported by a base plate ( I I), a normal lock ( 14) and a normal lever-type handle ( 13) characterized in that, due to the effect produced by its translation against the door (60) the emergency handle ( 15) determines movement of the bolt plate ( 12) against the base plate ( 11) with a consequent break in the ech- anical connection between said bolt plate ( 12) and the bolt (39) in the normal lock ( 14) permitting, due to movement of said handle ( 15), longitudinal translation of said bolt plate ( 12), consequent release of the door (60) even when its normal lock ( 14) is locked, and open- ing of said door (60). 2. Safety lock for doors with an emergency handle as in claim 1 , characterized in that mechanical connection between the bolt plate ( 12) and the bolt (39) in the normal lock is made by means of an intermediate device comprising a pin (44) fixed to the base plate ( 11) on which pin a cylinder (40) governed by a spring (46) can freely rotate, said cylinder having an orthogonal extension (41) subject to action by a tie rod (48,49) fixed to the bolt (39) of the normal lock ( 14), there being fixed on the bolt plate ( 12) a locking tooth (70) whose movement, affected by transla¬ tion of the bolt plate ( 12), is aligned with the plane of said extension (41) and interferes with the axis of the pin (44) of the cylinder (40), there being made in said extension (41) a radial slit (58) whose width is greater than the size of said locking tooth (70) so that when the normal lock ( 14) is locked, the door (60) is blocked by the bolt plate ( 12) itself being blocked by interference on the part of its locking tooth (70) against the exten¬ sion (41), while when the normal lock ( 14) is unlocked, its lock (39) having determined by means of said rod (47, 48) rotation of the extension (41) until its slit (58) is aligned with the tooth (70), it becomes possible by means of the normal lever-type handle ( 13) for the bolt plate ( 12) to translate freely, the door (60) to be re¬ leased and then to open. 3. Safety lock for doors with an emergency handle as in claim 2 characterized in that, following rotation of the end arms ( 72) with which it is .articulated ' onto the ' ' base.plate . ( 11), emergency handle ( 15) determines rotation of a vertical shaft ( 16) substantially parallel to the bolt plate ( 12), provided with an arm (86) at whose end there is a hook. (88 hat penetrates inside a longitudinal slot (62) in the bol plate ( 12) and an intermediate vertical rod (87), pressure by said rod (87) on the bolt plate ( 12) determining, due to rotation of the shaft ( 16), movement of said bolt plate ( 12) against the base plate ( 11) overcoming resistance set up by springs ( 18) and so removing the locking tooth (70) away from the extension (41), action by the end hook (88) to the arm (86) on the end (63) of the slot (62) de- termining translation of the bolt plate ( 12) and therefor release of the means blocking the door (60) against its frame, it being thus possible to open the door by simply pressing on the emergency handle ( 15). 4. Safety lock for doors with an emergency handle as in claim 3 characterized in that the vertical shaft (16) supports an arm (90) whose position corresponds to that of a glass pane (27), replaceable, supported by the base plate ( 11) so that rotation of said shaft ( 16), caused by movement of the emergency handle ( 15), determines breakage of said glass pane (27). 5. Safety lock for doors with an emergency handle as in claim 4 , characterized in that the glass pane (27) is associated to an electric sensor (91) that signals breakage of the glass to a control centre. 6. Safety lock for doors with an emergency handle as in clai 1 , characterized in that there is a pin (50) on the bolt platre ( 12), said pin acting on a sensor (54) that signals translation o£ the bolt plate to a control centre. 7. Safety lock for doors with an emergency handle as in claim 1 , characterized in that all moving parts are made of stain¬ less steel.

Inventors: PAPARAZZO RENATO, PAPARAZZO, RENATO
Applicants: IDEALSTRUTTURE SECURITY SYSTEM, PAPARAZZO RENATO, IDEALSTRUTTURE SECURITY SYSTEMS S.N.C. DI RENATO P, PAPARAZZO, RENATO
Application year: 1994
Main classification: E05B65
IPC codes: E05B39, E05B45, E05B55, E05B63, E05B65